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What does O/O stand for?

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Rank Abbr.Meaning
O/OOffice Of
O/OOn Order
OOObject Oriented (Programming)
O/OOwner Operator (trucking industry)
O/OOwned and Operated (broadcasting)
OOOlive Oil
OOPeroxide (functional group)
OOOn Order
OOOver and Out
OOOzzy Osbourne
OOOval Office
OOOwner Operator (trucking industry; also seen as O/O)
OOOperations Officer
OOOwner-Occupied (real estate)
O/OOverweight or Obese
OOSky West Airlines
OOOfficial Observer (amateur radio)
OOOptimum Online
O/OOperations Order
OOOriginal Oratory
OOOfficers Only
OOOmbudsman's Office
OOOsteoid Osteoma
OOObiettivi Operativi
OOOrdering Officer
OOOperator Office (trunks)
OOOphthalmic Optician
OOOld Oakhamian
OOOptimistic Orators (Toastmasters Club)
OOOnderling Onafhankelijk (Dutch)

Note: We have 13 other definitions for O/O in our Acronym Attic